Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

SKYWEST · FLIGHT OO 4639 SCHEDULED · TYPICAL SCHEDULE

Wednesday, September 30 Yesterday

OO 4639 · ATW → ORD

departs 6:20 AM CT · arrives 7:51 AM CT

Forecast issued Wed 10:00 PM ET · 15h after departure

OO 4639 isn’t flying ATW → ORD on Wed, Sep 30

This listing came from a typical schedule. According to the FAA, OO 4639 flies these legs that day:

BOI → SFO · 8:21 AM · landed
BOI → SFO · 8:25 AM · scheduled